diff --git a/data/out.cpp b/data/out.cpp
index d355907..282ca35 100644
--- a/data/out.cpp
+++ b/data/out.cpp
@@ -1,3 +1,4 @@
+#define LEAN_SYMBOLS_HEADER
 #include "{{ headerPath }}"
 
 // Thunk Template
diff --git a/src/common.ts b/src/common.ts
index e3151e8..7f2eab7 100644
--- a/src/common.ts
+++ b/src/common.ts
@@ -104,4 +104,5 @@ export function preventConstruction(self: string) {
     out += `${INDENT}${self}(const ${self} &) = delete;\n`;
     out += `${INDENT}${self} &operator=(const ${self} &) = delete;\n`;
     return out;
-}
\ No newline at end of file
+}
+export const LEAN_HEADER_GUARD = '#ifndef LEAN_SYMBOLS_HEADER\n';
\ No newline at end of file
diff --git a/src/method.ts b/src/method.ts
index 1dd87df..7456f7e 100644
--- a/src/method.ts
+++ b/src/method.ts
@@ -27,24 +27,22 @@ export class Method {
     getType() {
         return this.getName() + '_t';
     }
-    getProperty(hasWrapper: boolean) {
-        let out = INDENT;
-        if (hasWrapper) {
-            out += `${this.getWrapperType()}::ptr_type ${this.shortName}`;
-        } else {
-            out += `${formatType(this.returnType.trim())}(*${this.shortName})${this.args.trim()}`;
-        }
-        out += ';\n';
-        return out;
+    #getRawType() {
+        return INTERNAL + 'raw_' + this.getType();
     }
-    getWrapperType() {
-        return `std::remove_pointer_t<decltype(${this.getName()})>`;
-    }
-    #getSignature() {
-        return this.returnType.trim() + this.args.trim();
+    getProperty() {
+        return `${INDENT}${this.#getRawType()} *${this.shortName};\n`;
     }
     #getFullType() {
-        return `${INTERNAL}Function<${this.#getSignature()}>`;
+        return `${INTERNAL}Function<${this.#getRawType()}>`;
+    }
+
+    // Typedefs
+    generateTypedefs() {
+        let out = '';
+        out += `typedef ${formatType(this.returnType.trim())}${this.#getRawType()}${this.args.trim()};\n`;
+        out += `typedef std::function<${this.#getRawType()}> ${this.getType()};\n`;
+        return out;
     }
 
     // Overwrite Helper
@@ -53,9 +51,7 @@ export class Method {
     }
     generate(code: boolean, isVirtual: boolean, parentSelf?: string) {
         let out = '';
-        if (!code) {
-            out += 'extern ';
-        }
+        out += 'extern ';
         const type = this.#getFullType();
         out += `${type} *const ${this.getName()}`;
         if (code) {
@@ -64,14 +60,11 @@ export class Method {
                 const parentMethod = parentSelf ? `(void *) ${this.#getVirtualCall(parentSelf)}` : 'nullptr';
                 out += `&${this.#getVirtualCall()}, ${parentMethod}`;
             } else {
-                out += `${this.getWrapperType()}::ptr_type(${toHex(this.address)})`;
+                out += `(${this.#getRawType()} *) ${toHex(this.address)}`;
             }
             out += `, ${INTERNAL}thunk<&${this.getName()}>)`;
         }
         out += ';\n';
-        if (!code) {
-            out += `typedef ${this.getWrapperType()}::type ${this.getType()};\n`;
-        }
         return out;
     }
 }
\ No newline at end of file
diff --git a/src/struct.ts b/src/struct.ts
index c0f354f..484fcf9 100644
--- a/src/struct.ts
+++ b/src/struct.ts
@@ -1,4 +1,4 @@
-import { INDENT, STRUCTURE_FILES, toHex, assertSize, INTERNAL, preventConstruction } from './common';
+import { INDENT, STRUCTURE_FILES, toHex, assertSize, INTERNAL, preventConstruction, LEAN_HEADER_GUARD } from './common';
 import { Method } from './method';
 import { Property, StaticProperty } from './property';
 import { VTable } from './vtable';
@@ -161,6 +161,7 @@ export class Struct {
     }
     #generateMethods() {
         let out = '';
+        out += LEAN_HEADER_GUARD;
         // Normal Methods
         for (const method of this.#methods) {
             out += this.#generateMethod(method, false);
@@ -175,6 +176,7 @@ export class Struct {
             }
         }
         // Return
+        out += '#endif\n';
         return out;
     }
 
@@ -198,11 +200,18 @@ export class Struct {
         }
 
         // Method Wrappers
+        let typedefs = '';
+        let methodsOut = '';
         for (const method of this.#methods) {
             if (!method.isInherited) {
-                out += method.generate(false, false);
+                typedefs += method.generateTypedefs();
+                methodsOut += method.generate(false, false);
             }
         }
+        out += typedefs;
+        out += LEAN_HEADER_GUARD;
+        out += methodsOut;
+        out += '#endif\n';
 
         // Structure
         out += `struct ${this.#name} {\n`;
diff --git a/src/vtable.ts b/src/vtable.ts
index 702b980..2c3ecfc 100644
--- a/src/vtable.ts
+++ b/src/vtable.ts
@@ -1,4 +1,4 @@
-import { INDENT, POINTER_SIZE, assertSize, getSelfArg, preventConstruction, toHex } from './common';
+import { INDENT, LEAN_HEADER_GUARD, POINTER_SIZE, assertSize, getSelfArg, preventConstruction, toHex } from './common';
 import { Method } from './method';
 import { Property } from './property';
 
@@ -116,13 +116,20 @@ export class VTable {
 
         // Wrappers
         const methods = this.getMethods();
-        if (this.canGenerateWrappers()) {
-            for (const info of methods) {
-                if (info) {
-                    out += info.generate(false, true);
+        let typedefs = '';
+        let methodsOut = '';
+        for (const info of methods) {
+            if (info) {
+                typedefs += info.generateTypedefs();
+                if (this.canGenerateWrappers()) {
+                    methodsOut += info.generate(false, true);
                 }
             }
         }
+        out += typedefs;
+        out += LEAN_HEADER_GUARD;
+        out += methodsOut;
+        out += '#endif\n';
 
         // Structure
         out += `typedef struct ${this.#getName()} ${this.#getName()};\n`;
@@ -130,7 +137,7 @@ export class VTable {
         for (let i = 0; i < methods.length; i++) {
             const info = methods[i];
             if (info) {
-                out += info.getProperty(this.canGenerateWrappers());
+                out += info.getProperty();
             } else {
                 out += `${INDENT}void *unknown${i};\n`;
             }